Diesel emissions regulation and control
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Diesel Emissions Regulation and Control. Impact of ARB Regulation. Diesel Particulate Matter Composition. Highly variable chemical mixture Dependent on engine, fuel and combustion parameters Balance of organic and inorganic carbon to sulfates is a function of sulfur fraction in fuel

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Diesel emissions regulation and control

Diesel Emissions Regulation and Control

Impact of ARB Regulation


Diesel particulate matter composition
Diesel Particulate Matter Composition

  • Highly variable chemical mixture

  • Dependent on engine, fuel and combustion parameters

  • Balance of organic and inorganic carbon to sulfates is a function of sulfur fraction in fuel

  • Measured as all PM emitted from diesel engine

  • Difficult to measures in ambient air --surrogates typically used

    • Elemental carbon

    • Organic carbon

    • Black carbon



Sources of diesel emissions
Sources of Diesel Emissions

  • On road mobile sources

    • Cars

    • Trucks

  • Off-road mobile sources

    • Heavy equipment

    • Trains

    • Marine Vessels

  • Stationary sources

    • Emergency generators

    • Other diesel-fueled equipment


Arb diesel risk reduction program
ARB Diesel Risk Reduction Program

  • On-road mobile sources

    • Lower emissions standards for HDV engines

    • Retrofit existing engines

    • Solid waste vehicle standards

    • Other vehicle fleet standards

  • Off-road mobile sources

    • Lower emissions standards

    • Retrofit of existing engines

    • Auxiliary engine fuel standards

    • Harbor craft standards

    • Other marine vessel measures in progress




Typical diesel pm reduction measures
Typical Diesel PM Reduction Measures

  • Lower Sulfur in fuel

    • Mostly reduces sulfate portion of PM

  • Add-on PM filter

  • Replace diesel fuel

    • With natural gas for some vehicles

    • With electrical power for other uses

  • Improve engine design to reduce PM emissions

    • Require newer models for use